You can buy generic rack rails and cut them to length... Or with the mixer--you may look at instead buying some 90degree pre-drilled angle braces and using those instead... If Peavy isn't selling them directly--you culd be hard pressed to find them..
If you can't find any, I would look at either building your own/cutting down some generics or looking into using a rack mounted tray. Unfortunately the Peavy site was down when I tried to view your link (even going straight to www.peavey.com) and I am not familiar with that particular unit.
Yes - but that wouldn't have affected me, as I typed that in here during my response. I typed www.peavey.com into the browser. Anyhow - the problem appears to be local as I was having some difficulties with several web sites today, including CB. Not sure why.
well in my experience, music shops will not always stock such accessories as quite often they don't move all that many. Most common ones that I see are for rack mounting half rack sized equipment or for wireless mic receivers.
If they stockPeavey, then they should be able to order it in for you.
Otherwise, just fabricate some out of aluminium angle - you should be able to get it in the necessary width. If not, get some sheet metal bent up.
* Cut to length (make them the same length as the side of the mixer as this will make lining everything up a whole lot easier).
*Hold each length behind the rack strip to get the right position for the rack holes.
* Mark out the holes to mount them to the mixer (use a cardboard stencil to do this).
A sliding shelf would do hte trick too. I use RackSolutions (www.racksolutions.com) in datacenters all the time. They have a good assortment of shelves fixed and sliding for when I have gear that the rails don't fit the rack, no rails, etc. Definetely recommend them.